Or HaChaim on Deuteronomy 34:11/אור החיים על דברים ל״ד:י״א

1 לכל האותות as evident by all the signs, etc. This verse is part of the previous verse in which the relationship between Moses and G'd is described as one where they talked to each other face to face. The reason this was so was to enable Moses to perform all the miracles he had performed. In other words, G'd had informed Moses face to face when instructing him to perform the miracles.

2We may also understand these words in light of what Maimonides wrote in chapter 10,1 of his Hilchot Yesodey HaTorah that when a prophet arises in Israel there is no need for him to legitimise himself through the performance of miracles such as the ones performed by Moses in which the laws of nature were changed. It suffices if he correctly predicts events which will take place in the future. You will find that the Torah wrote something reflecting the people's belief in Moses as a prophet on two separate occasions. One occasion is in Exodus 14,31 where the Torah reports that "the people believed in G'd and in Moses His servant." The second occasion is Exodus 19,9 where G'd promised Moses that the people would have faith in him on an ongoing basis.

3Please refer to what I have written on Exodus 20,16 in connection with the words: "speak with us and we will listen." I explained there that the meaning is that the Israelites expressed their willingness to accept whatever Moses would tell them in G'd's name. This proves that they had previously accepted him as a prophet.

4This is why the Torah writes here that no prophet like Moses arose again amongst the Israelites, i.e. no other prophet enjoyed the complete trust of the people as had Moses. ולכל היד החזקה. These words refer to the miracles of splitting the sea of reeds, which was one of the miracles that caused the people to believe in Moses; the words ולכל המוראה הגדול refer to the revelation at Mount Sinai and Moses' share in it. At that time the people realised there would never be another prophet who would be able to do this.

5The Torah concludes with the words לעיני כל ישראל, before the eyes of the whole nation of Israel. This means these people all were eye witnesses to the miracles performed by Moses. They did not have to rely on reports by other later prophets who would tell them about this. They knew that Moses the prophet of G'd was true, that his Torah was true, and that the living G'd was a true fact.